/**
* @brief Send an amount of data
* @param hpcd: PCD handle
* @param ep_addr: endpoint address
* @param pBuf: pointer to the transmission buffer
* @param len: amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PCD_EP_Transmit(PCD_HandleTypeDef *hpcd, uint8_t ep_addr, uint8_t *pBuf, uint32_t len)
{
PCD_EPTypeDef *ep;
uint16_t pmabuffer = 0;
ep = &hpcd->IN_ep[ep_addr & 0x7F];
/*setup and start the Xfer */
ep->xfer_buff = pBuf;
ep->xfer_len = len;
ep->xfer_count = 0;
ep->is_in = 1;
ep->num = ep_addr & 0x7F;
__HAL_LOCK(hpcd);
/*Multi packet transfer*/
if (ep->xfer_len > ep->maxpacket)
{
len=ep->maxpacket;
ep->xfer_len-=len;
}
else
{
len=ep->xfer_len;
ep->xfer_len =0;
}
/* configure and validate Tx endpoint */
if (ep->doublebuffer == 0)
{
PCD_WritePMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, len);
PCD_SET_EP_TX_CNT(hpcd->Instance, ep->num, len);
}
else
{
/*Write the data to the USB endpoint*/
if (PCD_GET_ENDPOINT(hpcd->Instance, ep->num)& USB_EP_DTOG_TX)
{
/*Set the Double buffer counter for pmabuffer1*/
PCD_SET_EP_DBUF1_CNT(hpcd->Instance, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr1;
}
else
{
/*Set the Double buffer counter for pmabuffer0*/
PCD_SET_EP_DBUF0_CNT(hpcd->Instance, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr0;
}
PCD_WritePMA(hpcd->Instance, ep->xfer_buff, pmabuffer, len);
PCD_FreeUserBuffer(hpcd->Instance, ep->num, ep->is_in);
}
PCD_SET_EP_TX_STATUS(hpcd->Instance, ep->num, USB_EP_TX_VALID);
__HAL_UNLOCK(hpcd);
return HAL_OK;
}
/**
* @brief This function handles PCD Endpoint interrupt request.
* @param hpcd: PCD handle
* @retval HAL status
*/
static HAL_StatusTypeDef PCD_EP_ISR_Handler(PCD_HandleTypeDef *hpcd)
{
PCD_EPTypeDef *ep;
uint16_t count=0;
uint8_t EPindex;
__IO uint16_t wIstr;
__IO uint16_t wEPVal = 0;
/* stay in loop while pending interrupts */
while (((wIstr = hpcd->Instance->ISTR) & USB_ISTR_CTR) != 0)
{
/* extract highest priority endpoint number */
EPindex = (uint8_t)(wIstr & USB_ISTR_EP_ID);
if (EPindex == 0)
{
/* Decode and service control endpoint interrupt */
/* DIR bit = origin of the interrupt */
if ((wIstr & USB_ISTR_DIR) == 0)
{
/* DIR = 0 */
/* DIR = 0 => IN int */
/* DIR = 0 implies that (EP_CTR_TX = 1) always */
PCD_CLEAR_TX_EP_CTR(hpcd->Instance, PCD_ENDP0);
ep = &hpcd->IN_ep[0];
ep->xfer_count = PCD_GET_EP_TX_CNT(hpcd->Instance, ep->num);
ep->xfer_buff += ep->xfer_count;
/* TX COMPLETE */
HAL_PCD_DataInStageCallback(hpcd, 0);
if((hpcd->USB_Address > 0)&& ( ep->xfer_len == 0))
{
hpcd->Instance->DADDR = (hpcd->USB_Address | USB_DADDR_EF);
hpcd->USB_Address = 0;
}
}
else
{
/* DIR = 1 */
/* DIR = 1 & CTR_RX => SETUP or OUT int */
/* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */
ep = &hpcd->OUT_ep[0];
wEPVal = PCD_GET_ENDPOINT(hpcd->Instance, PCD_ENDP0);
if ((wEPVal & USB_EP_SETUP) != 0)
{
/* Get SETUP Packet*/
ep->xfer_count = PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
PCD_ReadPMA(hpcd->Instance, (uint8_t*)hpcd->Setup ,ep->pmaadress , ep->xfer_count);
/* SETUP bit kept frozen while CTR_RX = 1*/
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, PCD_ENDP0);
/* Process SETUP Packet*/
HAL_PCD_SetupStageCallback(hpcd);
}
else if ((wEPVal & USB_EP_CTR_RX) != 0)
{
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, PCD_ENDP0);
/* Get Control Data OUT Packet*/
ep->xfer_count = PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
if (ep->xfer_count != 0)
{
PCD_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, ep->xfer_count);
ep->xfer_buff+=ep->xfer_count;
}
/* Process Control Data OUT Packet*/
HAL_PCD_DataOutStageCallback(hpcd, 0);
PCD_SET_EP_RX_CNT(hpcd->Instance, PCD_ENDP0, ep->maxpacket);
PCD_SET_EP_RX_STATUS(hpcd->Instance, PCD_ENDP0, USB_EP_RX_VALID);
}
}
}
else
{
/* Decode and service non control endpoints interrupt */
/* process related endpoint register */
wEPVal = PCD_GET_ENDPOINT(hpcd->Instance, EPindex);
if ((wEPVal & USB_EP_CTR_RX) != 0)
{
/* clear int flag */
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, EPindex);
ep = &hpcd->OUT_ep[EPindex];
/* OUT double Buffering*/
if (ep->doublebuffer == 0)
{
count = PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
if (count != 0)
{
PCD_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, count);
}
}
else
{
if (PCD_GET_ENDPOINT(hpcd->Instance, ep->num) & USB_EP_DTOG_RX)
{
/*read from endpoint BUF0Addr buffer*/
count = PCD_GET_EP_DBUF0_CNT(hpcd->Instance, ep->num);
if (count != 0)
{
PCD_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr0, count);
}
}
else
{
/*read from endpoint BUF1Addr buffer*/
count = PCD_GET_EP_DBUF1_CNT(hpcd->Instance, ep->num);
if (count != 0)
{
PCD_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr1, count);
}
}
PCD_FreeUserBuffer(hpcd->Instance, ep->num, PCD_EP_DBUF_OUT);
}
/*multi-packet on the NON control OUT endpoint*/
ep->xfer_count+=count;
ep->xfer_buff+=count;
if ((ep->xfer_len == 0) || (count < ep->maxpacket))
{
/* RX COMPLETE */
HAL_PCD_DataOutStageCallback(hpcd, ep->num);
}
else
{
HAL_PCD_EP_Receive(hpcd, ep->num, ep->xfer_buff, ep->xfer_len);
}
} /* if((wEPVal & EP_CTR_RX) */
if ((wEPVal & USB_EP_CTR_TX) != 0)
{
ep = &hpcd->IN_ep[EPindex];
/* clear int flag */
PCD_CLEAR_TX_EP_CTR(hpcd->Instance, EPindex);
/* IN double Buffering*/
if (ep->doublebuffer == 0)
{
ep->xfer_count = PCD_GET_EP_TX_CNT(hpcd->Instance, ep->num);
if (ep->xfer_count != 0)
{
PCD_WritePMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, ep->xfer_count);
}
}
else
{
if (PCD_GET_ENDPOINT(hpcd->Instance, ep->num) & USB_EP_DTOG_TX)
{
/*read from endpoint BUF0Addr buffer*/
ep->xfer_count = PCD_GET_EP_DBUF0_CNT(hpcd->Instance, ep->num);
if (ep->xfer_count != 0)
{
PCD_WritePMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr0, ep->xfer_count);
}
}
else
{
/*read from endpoint BUF1Addr buffer*/
ep->xfer_count = PCD_GET_EP_DBUF1_CNT(hpcd->Instance, ep->num);
if (ep->xfer_count != 0)
{
PCD_WritePMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr1, ep->xfer_count);
}
}
PCD_FreeUserBuffer(hpcd->Instance, ep->num, PCD_EP_DBUF_IN);
}
/*multi-packet on the NON control IN endpoint*/
ep->xfer_count = PCD_GET_EP_TX_CNT(hpcd->Instance, ep->num);
ep->xfer_buff+=ep->xfer_count;
/* Zero Length Packet? */
if (ep->xfer_len == 0)
{
/* TX COMPLETE */
HAL_PCD_DataInStageCallback(hpcd, ep->num);
}
else
{
HAL_PCD_EP_Transmit(hpcd, ep->num, ep->xfer_buff, ep->xfer_len);
}
}
}
}
return HAL_OK;
}